Selected list of locations for finding open content and tools, along with recommended strategies, grouped by type of content.

The Mason OER Metafinder searches seventeen targets in real-time, including well-known OER repositories like OpenStax, OER Commons, MERLOT but also sites like HathiTrust, DPLA, Internet Archive and NYPL Digital Collections where valuable but often overlooked open educational materials may be found.

OASIS is a meta search tool developed by SUNY Geneseo that searches across 52 different OER sources and includes a range of materials, including textbooks, courses and corresponding materials, interactive simulations, public domain books, audiobooks, modules, open access books, videos and podcasts on a variety of topics — from anthropology to zoology. OASIS also is the only tool that allows users to limit searches by creative commons licenses or by faculty review

College Open Textbooks is a large collaborative of non-profit and for-profit organizations designed to promote the use of open textbooks. The site has a collection more than 100 peer reviewed open texts available for classroom use.

Funded by British Columbia’s Ministry of Advanced Education, BCCampus OpenEd has published over 40 open textbooks designed for use in first and second year undergraduate courses. Digital versions of the texts are freely downloadable.

OAPEN (Open Access Publishing in European Networks) is a non-profit organization dedicated to the open access of academic books in a wide range of languages. The library is fully searchable and is mainly focused on collecting in the Humanities and Social Sciences.

OER Repositories

An initiative of the California State University system, Merlot is free peer reviewed collection of educational materials meant for use in higher education.
The collection consists of tens of thousands of discipline-specific resources, course assignments, and contributor comments to guide instruction.

The Open Course Library is a collection of sharable educational materials that have been designed by college faculty, librarians, or other experts. Sponsored by the Washington State Board of Education, these resource have undergone assessment to ensure quality.

OCW Educator helps teachers search the vast library of MIT's Open CourseWare resources to find instructional approaches and teaching materials. You can search by subject, then facet by types of course content and specialty.

An open access database containing reliable and reproducible research assignments that do not live as isolated entities, but are enhanced by user feedback in order to build a rich corpus of best practices.

Drawing from online materials from libraries, archives, and museums across the United States, the sets use letters, photographs, posters, oral histories, video clips, sheet music, and more. Each set includes a topic overview, ten to fifteen primary sources, links to related resources, and a teaching guide.

MIT OpenCourseWare (OCW) is a web-based publication of virtually all MIT course content. OCW is open and available to the world; materials have an Attribution-NonCommercial-ShareAlike Creative Commons license. OCW does not offer certificates of completion.

This site aggregates Massive Open Online Courses (MOOCs) from more than 470 different universities, including Stanford, Harvard, and the Massachusetts Institute of Technology (MIT). It also offers a notification/reminder service called MOOC Tracker.

Offers more than 300 free, self-paced courses. All required course resources—including textbooks, videos, webpages, and activities—are accessible at no charge. Saylor courses also contain a free final exam with the opportunity to earn a free course completion certificate.

All Udacity courses offer free access to course materials, but some courses charge for the full course experience (including access to projects, code-review and feedback, a personal Coach, and verified certificates). The price varies depending on the course.

Open Educational Resource Community Websites

WikiEducator is an evolving community intended for the collaborative: planning of education projects linked with the development of free content; development of free content on Wikieducator for e-learning; work on building open education resources (OERs) on how to create OERs; networking on funding proposals developed as free content.

The Librarian OER Toolbox is a collection of links to (mostly) open resources. It is designed for librarians, expert searchers, and people who "enjoy the hunt" through overwhelming volumes of information. This site represents the most comprehensive lists we have found of the places to look for open educational resources written in English.